Optical disc on which information is written on a block-by-block basis

Abstract

A method for writing a signal on an optical disk is disclosed. The optical disk comprises a track groove on a recording surface thereof, on which information is recorded along the track groove on a block-by-block basis each said block having a predetermined length and where an identification mark indicating the beginning of each said block, has been formed on the track groove. Writing is started before the identification mark, located at the beginning of at least one block on which the signal should be written, is reached and writing is ended after the identification mark located at the end of the at least one block on which the signal should be written has been passed.

1. A method for writing a signal on an optical disk, which comprises a track groove on a recording surface thereof, on which information is recorded along the track groove on a block-by-block basis, each said block having a predetermined length and where an identification mark indicating the beginning of each said block, has been formed on the track groove,
 wherein writing is started before the identification mark, located at the beginning of at least one block on which the signal should be written, is reached and 
 wherein the writing is ended after the identification mark located at the rear of the at least one block on which the signal should be written has been passed, and 
 wherein a next writing is started in such a way that a portion of next data overlaps with an end of previous recorded data, and 
 wherein an area in which the next data overlaps with the previous recorded data does not include the identification mark. 
 
     
     
       2. An optical disk medium, which comprises a track groove on a recording surface thereof, on which information is recorded along the track groove on the basis of a block unit having a predetermined length,
 wherein an identification mark indicating the beginning of each said block unit is formed on the track groove, and 
 wherein writing is started before the identification mark, located at the beginning of at least one block unit on which the signal should be written, is reached, and 
 wherein the writing is ended after the identification mark, located at the rear of the at least one block unit on which the signal should be written, has been passed, and 
 wherein a next writing is started in such a way that a portion of next data overlaps with an end of previous recorded data, and 
 wherein an area in which the next data overlaps with the previous recorded data does not include the identification mark. 
 
     
     
       3. A method for reproducing information recorded on the optical disk medium of  claim 2 , the method comprising:
 reading a portion of the data recorded on the optical disk.